Table 3 Co-occurrence of additional substance use behaviours for those who smoked marijuana, smoked tobacco, or engaged in binge drinking in the past month

Smoked marijuana

  Only smoked marijuana

47

17.6 (11.5-23.7)

  Also smoked tobacco but did not binge drink

42

14.2 (10.1-18.2)

  Also engaged in binge drinking but did not smoke tobacco

60

21.4 (15.8-27.0)

  Also both smoked tobacco and engaged in binge drinking

131

46.8 (40.1-53.5)

Smoked tobacco

  Only smoked tobacco

77

23.9 (18.9-28.9)

  Also smoked marijuana but did not binge drink

42

13.0 (9.4-16.6)

  Also engaged in binge drinking but did not smoke marijuana

58

20.2 (15.5-25.0)

  Also both smoked marijuana and engaged in binge drinking

131

42.9 (36.9-48.9)

Engaged in binge drinking

  Only engaged in binge drinking

214

45.3 (39.9-50.6)

  Also smoked marijuana but did not smoke tobacco

60

13.0 (9.7-16.3)

  Also smoked tobacco but did not smoke marijuana

58

13.4 (10.2-16.5)

  Also both smoked marijuana and tobacco

131

28.4 (23.0-33.7)